A) 9cm
B) 12cm
C) 15cm
D) 36cm

Answer:

7x+6x

Step-by-step explanation:

Distributive property. 7 times x = 7x. 6 times x = 6x

Answer:

roots are 5, -2

Step-by-step explanation:

set each factor equal to zero and solve:

x - 5 = 0

x = 5

x + 2 = 0

x = -2

Answer:

x = 5, -2

Step-by-step explanation:

(x - 5)(x + 2) = 0

Using the 0 product property:

Case 1

Case 2

The roots are [tex]\boxed{5, -2}[/tex]

-Chetan K

Answer:

7√10

Step-by-step explanation:

√14 × √35 = √(14 × 35) = √(2 × 7 × 5 × 7) = √(49 × 10) = 7√10

Answer:

D

Step-by-step explanation:

31.98≈32

41% of 78

41/100 *78

0.41*78=31.98

31.98≈32

Answer:

2

Step-by-step explanation:

Look at the picture. That's the probability tree for this question. Since you replace the marble, the second branch will only have 4 outcomes

(4/5)*(3/4)=(3/5)

Look at the second picture. That's what'll happen if you do replace the marble and it'll have 5 outcomes

(4/5)*(4/5)=16/25

If you make the denominators the same, itll be 15/25 if you replace the marble

And 16/25 if you don't replace the marble

Since 16/25 > 15/25, it'll be higher if you don't replace the first marble.

:))

Answer:

simply by multiplying the hours with 60

eg 3hours

3×60

180minutes

Answer:

10 times.

Step-by-step explanation:

The 1 in the 615 is in the tenths place.

The 1 in the 91 is in the ones place.

So, the one in the 615 is 10 times greater than the one in 91.

Look:

1x10 is 10, the 1 in 615 is basically 10, and the 1 in 91 is basically 1.

Answer:

14 is the answer of your question

Answer:

A)

B)

H)

I)

Step-by-step explanation:

let me know if needed

Answer:

A liter is 1000 mL so half of 1000 = 500

500 mL is the answer!Step-by-step explanation:

Answer:

x = 24

Step-by-step explanation:

A 45- 45- 90 triangle is isosceles ( base angles congruent )

The the legs are congruent , both 12[tex]\sqrt{2}[/tex]

Using Pythagoras' identity in the right triangle , then

x² = (12[tex]\sqrt{2}[/tex] )² + (12[tex]\sqrt{2}[/tex] )² = 288 + 288 = 576 ( take square root of both sides )

x = [tex]\sqrt{576}[/tex] = 24

The value of x in the given triangle is 24 units.

The Pythagorean theorem states that the sum of the squares on the legs of a right triangle is equal to the square on the hypotenuse.

Given that, a 45-45-90 triangle with a leg of length 12 times the square root of 2 and hypotenuse of length x

Let the triangle be ABC, right-angled at B,

Using the Pythagoras theorem, we get,

AB²+BC² = AC²

(12√2)²+(12√2)² = x²

288+288 = x²

x² = 576

x = √576

x = 24

Hence, the length of the hypotenuse is 24 units.

For more references on Pythagoras theorem, click;

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Using triangle concepts, it is found that there are 3 ways to choose a number from each set such that the three could be the sides of a nondegenerate triangle.

In a triangle, the sum of the lengths of the two smaller sides has to be greater than the length of the greater side.

In this problem, the possible lengths are:

Hence, there are 3 ways to choose a number from each set such that the three could be the sides of a nondegenerate triangle.

You can learn more about triangle concepts at https://brainly.com/question/25645873

Answer:

A: Y = X + 2.5

B: 10

Step-by-step explanation:

A: To form the equation you have to use one of the numbers in X (U.k Size) for this example we'll use 3 and to form the equation you have to see how much to add to X ( UK size) to get Y ( US size) and in this case it's +2.5

B: You can use the equation we just formed to get this answer by adding 2.5 to 7.5 which will give you 10

well, from 273 to 250 is 23 bucks, so that's the difference.

we know 273 is the original price, or namely the 100%, so what's 23 bucks off of it in percentage?

[tex]\begin{array}{ccll} amount&\%\\ \cline{1-2} 273&100\\ 23&x \end{array}\implies \cfrac{273}{23}=\cfrac{100}{x}\implies \implies 273x=2300 \\\\\\ x=\cfrac{2300}{273}\implies x\approx 8.42[/tex]

Answer:missing angle = 42, x=10

Step-by-step explanation: to find the missing angle, we need to subtract 48 from 90, because it is a right angle. 90-48=42.

therefore, 3x+12=42

3x=42-12

3x=30

X=30/3

x=10

By using the distributive property, the equivalent expression would be 15x + 30.

The distributive property states that an expression of the form A(B + C) can be solved by a multiplication over addition operation that is

A(B + C) = AB + AC

This property is known by distributive law and applies to subtraction also.

By applying distributive property

15(x + 2)

= (15 × x) + (15 × 2)

= 15x + 30

Thus, The equivalent expression would be 15x + 30

Learn more about a distributive property;

https://brainly.com/question/5637942

The expression equivalent to 15(x + 2) is 15x + 30

Using the distributive property, we can expand the expression 15(x + 2) as follows:

Multiply 15 by each term inside the parentheses:

15 * x + 15 * 2

Simplify each multiplication:

15x + 30

Therefore, the expression equivalent to 15(x + 2) is 15x + 30. The distributive property allows us to distribute the factor (15) to each term inside the parentheses and then combine the resulting terms to obtain the simplified expression.

To know more about expression:

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Answer:

TR is the smallest side.

RS is in the middle.

ST is the largest side.

Step-by-step explanation:

Angle R is the biggest angle, so it is opposite from the biggest side (not R) side ST.

Angle S is the smallest angle so it is opposite from the smallest side (not S) side TR.

The third angle is in between, so the opposite side is in between.

Answer:

[tex] \frac{6}{30} = \frac{x}{100} [/tex]

[tex]30(x) = 100(6)[/tex]

[tex]30 \times x = 100 \times 6[/tex]

[tex]30x = 600[/tex]

[tex]x = \frac{60 \cancel0}{3 \cancel0} [/tex]

[tex]x = \cancel \frac{60}{3} \: {}^{20} [/tex]

[tex]x = 20[/tex]

Answer:

A.  Infinite

B.  One

C.  None

D.  None

See attachment.

Answer:

hey have made this a little more confusing than it has to be. Usually we use H+ in chemistry instead of t, but you can also use X, Y if it's easier where Y = -log(X) where X= hydronium and Y = pH.

Which also means Y=p(t) and X = t.

To graph this, I would suggest using values for X like 0.1, 0.2, 0.5, 0.7, 1.0, 1.5, or similar numbers. Then use your calculator to calculate Y values for each of these X values and plot them. You can also use a spreadsheet. If you have Excel I can help you to use it. Either way you can then use your graph to answer the questions in part 1 where Y = 0 and Y=1 and just read off the X values.

Part 2 is worded badly. It's ambiguous to say "raised by 0.5" since if you raise hydronium (= X) by 0.5, the change in pH (=Y) will vary depending on where you start. They meant "raise to 0.5", though they do say this at the end of the question. Anyway, you can easily read it off your graph using 0.5 as the X value.

Now to set up the exponential function this is much easier than it sounds. Just remember that a logarithm is the inverse of an exponent so they cancel each other out:  As an example log(10X) = X.

So applying here, just take this equation  Y = -log(X) and raise 10 to both sides of the equation:

10Y = 10-log(X)    which gives you 10Y = 1/X or more usefully X = 10-Y where again X= hydronium and Y = pH

Part 3, these questions actually have no relationship to anything in chemical reality, but are just exercises to see if you can manipulate the graph and function. But they do illustrate at least one interesting point. Note that in the equation

X = 10-Y

X can never =0. This makes sense since there is nothing you can raise 10 to that will make it zero. It also makes sense chemically since in water you can never have zero hydronium. Similarly using the other form

Y = -log(X)

You know X can also never be zero since you can't have log(0).

Now when they ask for a "Y intercept" they are asking for when X=0 which as stated is never in the above case. However when you transform the equation the ways they want you to, then maybe sometimes you can:

So for p(t) + 1 that really means Y = -log(x) + 1.  Still here you can not have a Y intercept (X can't =0) since you would still have log(0) which is forbidden.

But p(t+1) really means Y = -log(X+1). Here of course X can be zero since that just gives you log(1). So you have a Y-intercept.

I'll leave it for you to figure out the third one, the question being if you set X=0, will you get log(0)? If so, that's forbidden. If not, you will have a Y intercept.

Answer:

D. no solution

Step-by-step explanation:

h-z=3(1)

h=3+z(minus z from both side)

put in the second equation

-3h,+3z=6(2)

-3(3+z)+3z=6

-9-3z+3z=6

-9=6( not true)

so the equation doesn't have a solution.

Answer:

SAS congruence postulate

Step-by-step explanation:

It is given that two sides are congruent and one included angle is also congruent, this is enough to use the SAS congruence postulate and prove the triangles congruent.

Hope this helps

Please mark brainliest ;)

Answer: .......

ok done. Thank to me :>

Answer:

The coefficient of q is 7

Step-by-step explanation:

The two expressions are

(23q – 34) and (–16q – r)

and .

(–16q – r)

The sum of the two expressions is

23q - 34 + -16q - r

When we group like terms the expression will be,

=23q - 16q - r - 34

When we  simplify the expression will now be

=7q - r - 34

The coefficient of q is the constant behind q in the expression.

The coefficient of q is therefore 7.

Answer:

127.24

Step-by-step explanation:

A= 3.14(pie) r^2

A=3.14(pie) 9^2

A=254.47 ÷2

A= 127.24

Answer:

Explanation:

To find the area of the triangle, we must multiply 1/2 x base x altitude to get the answer. But first, we need to simplify the height. We are given the base and the altitude.

Solution:

Hence, the area of the triangle is 27x³ + 27x² - 4 meters².